approx. repair costs for complete brake defect ?

Good morning, my search for a new good used one is so difficult that I come to the crazy idea to make my old but beloved Twingo float again and introduce to the Tüv. I suddenly had more braking effect on a very steep (but thanks to God) residential street NULL and with residual effect of the handbrake + motor brake still straight into the next side road, otherwise I would be full car on a busy Bundesstr Later I saw that the brake fluid had run out on the rear wheel and the tank was empty. It expired Tüv and it will be sure that one or other supporting part still to be welded, which someone reported to me on “his” last lift appearance. The Twingo is built/EZ 02/94 has run short over 200,000, 1239cbm. Does anyone have any idea about the rep-costs of the brake history – hand brake, foot brake back + front, venting, new brake cy Linder ??? … plus Holm(s) welding ? I know that such remote diagnostics are difficult to impossible … but only so that I have an approximate number of what it would cost. PS: am (unfortunately) no screwdriver … http://kleinanzeigen.ebay.de/…/146491905-216-1908?ref=myads